Karbon alternatives · Accounting
Open-source alternatives to Karbon
Karbon is not described as open source on its own site. 7 of the 128 other accounting and invoicing tools in this directory are open source, according to their own sites.
Karbon is a paid product, starting at $59 per user / month, billed yearly ($79 billed monthly). All of them are free or have a free plan.
7 tools · Listings checked up to Nov 13, 2026 · Where the facts come from
How each one differs from Karbon
- Free plan · from $31.10/mo
Odoo
Business app suite whose Accounting app is free when used on its own
- Odoo starts at $31.10 per user / month, billed annually, after $24.90 for the first 12 months. Karbon starts at $59 per user / month, billed yearly ($79 billed monthly).
- Odoo has a free plan. Karbon does not.
- Odoo is open source and self-hostable, according to its own site.
- Odoo also covers reports, bookkeeping and expense tracking.
- Free
Bigcapital
Open-source accounting you host yourself, with a cloud version planned
- Bigcapital is free. Karbon starts at $59 per user / month, billed yearly ($79 billed monthly).
- Bigcapital has a free plan. Karbon does not.
- Only Karbon lists iOS and Android apps.
- Bigcapital is open source and self-hostable, according to its own site.
- Free plan · from $72/yr
Akaunting
Open-source accounting you can host yourself or use in the cloud
- Akaunting starts at $72 per year, self-hosted. Karbon starts at $59 per user / month, billed yearly ($79 billed monthly).
- Akaunting has a free plan. Karbon does not.
- Only Karbon lists iOS and Android apps.
- Akaunting is open source and self-hostable, according to its own site.
- Free
GnuCash
Free double-entry accounting for home and small business use
- GnuCash is free. Karbon starts at $59 per user / month, billed yearly ($79 billed monthly).
- GnuCash has a free plan. Karbon does not.
- Only GnuCash lists Windows, macOS and Linux apps.
- Only Karbon lists a web app.
- Free
InvoicePlane
Free self-hosted invoicing for quotes, invoices and payments
- InvoicePlane is free. Karbon starts at $59 per user / month, billed yearly ($79 billed monthly).
- InvoicePlane has a free plan. Karbon does not.
- Only Karbon lists iOS and Android apps.
- InvoicePlane is open source and self-hostable, according to its own site.
- Free
InvoiceShelf
Open-source invoicing and expense tracking you host yourself
- InvoiceShelf is free. Karbon starts at $59 per user / month, billed yearly ($79 billed monthly).
- InvoiceShelf has a free plan. Karbon does not.
- Only Karbon lists iOS and Android apps.
- InvoiceShelf is open source and self-hostable, according to its own site.
- Free
LedgerSMB
Open-source double-entry accounting and ERP you install yourself
- LedgerSMB is free. Karbon starts at $59 per user / month, billed yearly ($79 billed monthly).
- LedgerSMB has a free plan. Karbon does not.
- Only Karbon lists iOS and Android apps.
- LedgerSMB is open source and self-hostable, according to its own site.
Common questions
Is there an open-source alternative to Karbon?
Yes. Odoo, Bigcapital, Akaunting, GnuCash, InvoicePlane, InvoiceShelf and LedgerSMB are open source, according to their own sites.
Is Karbon open source?
Karbon is not described as open source on its own site. The listing was checked on Nov 12, 2026 against the pages it cites.
When was this checked?
Each listing shows its own date. On this page they run from Oct 17, 2026 to Nov 13, 2026. Vendors change prices and plans without notice, so confirm on their site before you buy.
This page is built from the listings. A tool is here because its listing says so, and the order is how close each is to Karbon: the alternatives its listing names first, then the tools that share the most features with it.